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Explain why this is or is not a probability distribution. x 1 2 3 4 P(x) 0.2 0.1 0.4 0.2
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2 votes
Explain why this is or is not a probability distribution.

x
1
2
3
4

P(x)
0.2
0.1
0.4
0.2

User Manoj Suthar
by
6.2k points

1 Answer

2 votes
The sum of p(x) over all possible values of x is 1, that is

∑jpj=1where j represents all possible values that x can have and pj is the probability at xj.

yes it is probability distributionall sum is 0.9
all probability between 0 and 1
User Bluearrow
by
6.8k points
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